300results about How to "Reduced isolation" patented technology

An apparatus and method for providing controlled acoustic isolation within various forms of headsets. The invention provides manual and automatic mechanisms for changing the amount of acoustic isolation provided by the headsets. Sounds in the environment that the user wishes to be made aware of can be programmed into a set of stored sound selection characteristics. In response to correlation of the stored sound characteristics with sounds in the external environment the headset decreases acoustic isolation by coupling signals from one or more external microphones to the audio conversion elements within the earpieces. Alternatively, the apparatus can respond to sounds to be blocked by increasing acoustic isolation. A manual control may be activated by the user to decrease acoustic isolation at their discretion.

Apparatus and methods for controlled splitting and isolation of signals in a radio frequency network. In one embodiment, the network comprises a cable television network, and the apparatus comprises a signal splitter having controlled isolation loss at its output ports in at least one frequency band, thereby enabling communications between terminal devices at the subscriber premises that would otherwise be isolated by high losses typical of prior art splitters. The splitter apparatus can also be utilized with a filter/reflector circuit that advantageously provides maximal downstream frequency spectrum bandwidth while suitably reflecting the aforementioned communications to maintain them within the subscriber-side network without interference.

The present invention relates to methods for producing nanoparticle and microparticle powders of a biologically active material which have improved powder handling properties making the powders suitable for commercial use using dry milling processes as well as compositions comprising such materials, medicaments produced using said biologically active materials in particulate form and/or compositions, and to methods of treatment of an animal, including man, using a therapeutically effective amount of said biologically active materials administered by way of said medicaments.

A solid oxide fuel cell has anode, cathode and electrolyte layers each formed essentially of a multi-oxide ceramic material and having a far-from-equilibrium, metastable structure selected from the group consisting of nanocrystalline, nanocomposite and amorphous. The electrolyte layer has a matrix of the ceramic material, and is impervious and serves as a fast oxygen ion conductor. The electrolyte layer has a matrix of the ceramic material and a dopant dispersed therein in an amount substantially greater than its equilibrium solubility in the ceramic matrix. The anode layer includes a continuous surface area metallic phase in which electron conduction is provided by the metallic phase and the multi-oxide ceramic matrix provides ionic conduction.

There is provided a splitter circuit means for use with a CATV network comprising a signal input (34) in communication with a transformer or balun (32) to supply two signal outputs (36, 38), with a resistor (52) connected in parallel between the outputs (36, 38) and wherein additional capacitive, inductive and resistive elements (48, 50, 52, 54) are associated with the resistor (42), thereby to give an insertion loss in to out in the range of 3 to 10 dB and isolation 10 out to out of <17 dB for signal frequencies in the range 1125 MHz to 1700 MHz, while at the same time maintaining good RF performance in the frequency range 5 MHz to 1000 MHz.

A device for hardening an Ethernet switch is disclosed. The device provides cooling for the switch, and, suppresses electrical transients and electromagnetic interference, which could affect the power supply, and data transmission of the Ethernet switch. Using this device, the Ethernet switch can be used in harsh industrial environments, such as those present in power utility substations. The Ethernet switch may comprise a dual stage isolated power supply. The dual stage isolated power supply has a first DC to DC converter for converting received power from the received voltage to an intermediate voltage. The intermediate voltage is then further converted to a voltage which can be used by the Ethernet switch. Each of the DC to DC converters also provide galvanic isolation and also transient suppression and electromagnetic interference filtering to decrease adverse electrical effects which may be inherent in the power received from an external source. The first and second DC to DC converter provides a first level of galvanic isolation which is greater than the second level of galvanic isolation provided by the second DC to DC converter. The power supply circuit can be used in an Ethernet switch as well as any other intelligent electronic device.

A Ziegler-Natta catalyst composition comprising a solid mixture formed by halogenation of: Al) a spray-dried catalyst precursor comprising the reaction product of a magnesium compound, a non-metallocene titanium compound, and at least one non-metallocene compound of a transition metal other than titanium, with A2) an organoaluminium halide halogenating agent, a method of preparing, precursors for use therein, and olefin polymerization processes using the same.

A pulsed compression noise correlation radar uses noise modulation and pulse compression technology to scramble recognizable transmit signal characteristics and reduce transmit energy. The pulsed noise correlation radar advantageously uses pulse compression technology, a pulsed linear frequency modulated noise correlation mixer, and a new and innovative noise fused waveform to automatically correlate the pulsed linear frequency modulated (LFM) noise waveform with the received signal. The pulsed noise correlation radar apparatus and system now make it possible to effectively reduce transmitting power, preserve high band widths through oversampling in the receiver, and achieve multi-channel array frequency diversity. A secure pulsed compression noise correlation radar system and methods for undetected target detection with pulsed noise correlation radar and a pulsed LFM fused noise waveform are also provided.

Segregation of antiperspirant actives suspended in anhydrous compositions employing ester oils or non-volatile silicone oils having a refractive index of at least 1.5, preferably together with an alcohol oil, gelled with a fibre-forming amide gellant can be inhibited by including a segregation inhibitor, especially an arylene-alkylene block copolymer, such as a tri-block copolymer e.g. a styrene/ethylenebutylene/styrene copolymer or a styrene/butylene copolymer.

A semiconductor structure comprising: a substrate; a seed layer supported by the substrate; an elemental semiconductor layer disposed over a first portion of the seed layer; and a compound semiconductor layer disposed on a second portion of the seed layer. The first portion of the seed layer is electrically insulated from the second portion of the seed layer. A first semiconductor device is formed in the elemental semiconductor layer. A second semiconductor device is formed in the compound semiconductor layer. The second semiconductor device includes: a first electrode in contact with a first region of the compound semiconductor layer; a second electrode in contact with a second region of the compound semiconductor layer; and a third electrode. The third electrode controls carriers passing in a third region of the compound semiconductor layer disposed between the first region and the second region. A fourth electrode is in electrical contact with the second portion of the seed layer.

A concrete composition having a 28-day design compressive strength of 4000 psi and a slump of about 5 inches is optimized to have high workability and a high strength to cement ratio. The concrete composition contains about 375 pounds per cubic yard hydraulic cement (e.g., Portland cement), about 113 pounds per cubic yard pozzolanic material (e.g., Type C fly ash), about 1735 pounds per cubic yard fine aggregate (e.g., FA-2 sand), about 1434 pounds per cubic yard coarse aggregate (e.g., CA-11 state rock, ¾ inch), and about 294 pounds per cubic yard water (e.g., potable water). Workability and strength to cement ratio were increased compared to one or more preexisting concrete compositions having the same 28-day design compressive strength and similar slump by optimizing the ratio of fine aggregate to coarse aggregate. The concrete composition is further characterized by high cohesiveness, resulting in relatively little or no segregation or bleeding.

A film roll comprising a heat-shrinkable polystyrene based resin film wound into a roll, characterized in that, each of the samples taken out from the roll exhibits, in a heat shrinkage test under the condition of the immersion in a hot water at 85° C. for 10 sec, a heat shrinkage rate in the main shrinking direction of within ±5% relative to an average rate of the total samples; a heat-shrinkable polystyrene based resin film taken from the roll; a heat-shrinkable label comprising the film; a method for producing the heat-shrinkable polystyrene based resin film roll which comprises using raw material chips having a specific form, or using a hopper having a specific shape for feeding raw material chips to an extruder, or limiting the variation of the surface temperature of a film in a specific production step to a specific range.

The invention discloses an integrated exchange middleware and an implementation method thereof. The integrated exchange middleware comprises a data acquisition adapter for standard downloading of released data, realization of matching of acquired data to form a data acquisition rule, operation management, log recording, monitoring and supervision, realization of log recording and checking, and meanwhile, realization of monitoring management on running conditions, an integrated exchange middleware center end for realizing standard management, configuration management and operation management and realizing the log recording and checking of the integrated exchange middleware center end, and meanwhile, providing monitoring management on the running conditions, and a data receiving adapter for downloading a data receiving system exchange specification and performing user configuration, performing user configuration, relation and field mapping of a received data set and a receiving user table, and interface logic configuration, and further realizing operation management, realizing the log recording and checking of the adapter and providing monitoring management on the running conditions. The integrated exchange middleware has the advantages that the complexity of different application software integration is greatly reduced, the access cost is basically zero and the integration problem of the application software is effectively solved.

A compressed chewing gum tablet includes one or more pharmaceutically active ingredients and one or more enhancers, wherein the chewing gum tablet includes at least one chewing gum module including a chewing gum composition, and wherein the chewing gum composition includes chewing gum granules containing gum base, and wherein the enhancers are at least partly contained within at least a part of the chewing gum granules.

The invention relates to a dual-band multi-polarization common-caliber waveguide slot antenna which comprises an L-band vertical polarization antenna, a C-band vertical polarization antenna and a C-band horizontal polarization antenna, which are equal in length and are waveguide slot antennas. The C-band vertical polarization antenna and the C-band horizontal polarization antenna form a C-band dual-polarization antenna array which is positioned at the upper part, and the L-band vertical polarization antenna is positioned at the lower part; the L-band vertical polarization antenna, the C-band vertical polarization antenna and the C-band horizontal polarization antenna feed at an antenna waveguide tube center through a coaxial connector, and the coaxial connector and a waveguide tube form a 3dB power divider. The exciting effect on the L-band vertical polarization antenna, the C-band vertical polarization antenna and the C-band horizontal polarization antenna is realized. The dual-band multi-polarization common-caliber waveguide slot antenna realizes sharing of a plurality of waveguide slot antennas on the same physical caliber area. Compared with a dual-band multi-polarization micro-strip common-caliber antenna, the antenna has the advantages of being high in efficiency, high in polarization isolation, low in cross polarization and high in power capacity.

A multimode mobile terminal steers signals corresponding to different modes to different outputs of a quadrature combiner. For example, an EGPRS signal is steered to a first output port of the quadrature combiner and a WCDMA signal is steered to a second output port of the combiner. The combiner has a reasonably large degree of isolation between the output ports. The mobile terminal capitalizes on this isolation by reducing the isolation of a switch that facilitates switching between modes.